#!/bin/bash

# Get current swap usage for all running processes
# Erik Ljungstrom 27/05/2011
# Modified by Mikko Rantalainen 2012-08-09
# Pipe the output to "sort -nk3" to get sorted output
# Modified by Marc Methot 2014-09-18
# removed the need for sudo

SUM=0
OVERALL=0

for DIR in `find /proc/ -maxdepth 1 -type d -regex "^/proc/[0-9]+"`

do

 PID=`echo $DIR | cut -d / -f 3`
 PROGNAME=`ps -p $PID -o comm --no-headers`
 
for SWAP in `grep VmSwap $DIR/status 2>/dev/null | awk '{ print $2 }'`
do
let SUM=$SUM+$SWAP
done

 
if (( $SUM > 0)); then
 echo "PID=$PID swapped $SUM KB ($PROGNAME)"
fi

 let OVERALL=$OVERALL+$SUM
 SUM=0

done

echo "Overall swap used: $OVERALL KB"